

public class Trade {
    public static void main(String[] args) {
        item veg = new item(0,"蔬菜盲盒","包含随机几种蔬菜","蔬菜",15);
        user A = new user(0,"Suiren","539A");
        order today = new order("蔬菜",0) ;
        today.purchase(veg);
    }
}
